How to Program M2732 24-Pin EEPROM for SOMET Jacquard via PC and Compatible Software

Hi All
I have 24 pin EEPROM M2732, on SOMET Jacquard weaving machine. Used for programming textile patterns. I don't know how to program this IC. My question is:

1. Is it possible to interface this IC to PC via RS232? If yes could you please give me the schematic diagram of the interface circuit?

2. Which programming software is compatible to this IC?

I appreciate any help or starting Ideas.

You need a universal programmer. RS232 might be hard to find but USB exists (check out this one on eBay: USB Programmer TL866A support12000+ AVR/PIC ICSP SPI in-circuit include 7adapter -- but, I have no experience with this product so: at your own risk).

BUT, unless you have something to program into the M2732, the programmer won't be of any help. But, if you have something like a file that contains the data, then you should be able to use the programmer to transfer that data into the M2732. Or, if you know the syntax for programming textile patterns, then you would need some sort of editor to capture that code.

I suggest you contact the seller and describe your situation and see if they can verify that their device can handle whatever form the data is in.

dear sir,
Is it a really eeprom or disk on chip (embeded chip)
kindly let me Know then i can help you. according to me it must be a disk o n chip.

I doubt if it's EEPROM. It's probably EPROM (i.e. not Electrically Erasable, but UV erasable Electrically Programmable ROM -- if it has a window that exposes the top of the chip then that's a good clue to it being UV Erasable. Also, if it has that window, then it's definitely not "Disk on a Chip"). 2732 is a standard number for EPROM -- 32K (4kb x 8), 24 pins.

Which means, if you need to erase it, you will need a special, short-wave UV EPROM eraser (or a germicidal UV lamp: http://en.wikipedia.org/wiki/Germicidal_lamp -- also has a picture of a typical EPROM) If you go with the germicidal lamp, then you will need to experiment to determine the exposure time to fully erase the array.

And, in case you don't read the wikipedia artical about germicidal lamps but decide to use one, then WARNING:

AVOID EXPOSURE TO THE SKIN AND EYES -- SHORT WAVE UV LIGHT CAN CAUSE BURNS AN CAN DAMAGE THE EYES!!!

Hello,
The M2732A is a 32,768 bit UV erasable and electrically programmable memory EPROM. It is organized as 4,096 words by 8 bits. The M2732A with its single 5V power supply and with an access time of 200 ns,

For more see the attached datasheet.

*The only thing I need now is how to interface to PC and read the contents?*

Regards

Ohhhhhh... you only want to _read_ the thing (you referred to "programming software" so I assumed you wanted to write to it -- but I guess what you really want is a way to interpret what you read, am I right [and do you get the undertone of fumbling with a dearth of information, here?]

One way would be to connect it to a microcontroller [i.e. to the address, data, and ~E lines] and then write a program to run through the addresses and then send that data out, serially through the UART lines to an RS232 connection to your computer (you'll need a device such as the MAX232, to translate the voltages to the higher voltages needed to comm with the computer). And then use terminal software to receive the data and store it as a text file (for instance, you could use the session logger in the following freeware: http://www.hw-group.com/products/hercules/index_en.html)

BUT, that would require a knowledge of MCUs.

Another way would be to use a microprocessor chip, such as the Z80 and an SIO, and again, write a program to iterate through the contents of the EPROM and send, serially, through the SIO:

* http://www.z80.info/
* http://www.train-z.de/train-z/pdf/howto_program_the_Z80-SIO.pdf

But, an MCU with internal UART would be much easier.

But, if that is too nuts and bolts, then, you're best bet would be to get a universal programmer that also can read the device and store the content as a file (or process it however you plan to process it -- you haven't said anything about that ;)